What are all the background properties?

The background shorthand CSS property sets all background style properties at once, such as color, image, origin and size, or repeat method.

This property is a shorthand for the following CSS properties:

• background-attachment
• background-clip
• background-color
• background-image
• background-origin
• background-position
• background-repeat
• background-size

So there are 9 background properties in total.

Source: https://developer.mozilla.org/en-US/docs/Web/CSS/background